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Evaluation of reference genes for expression studies in the broad mite, Polyphagotarsonemus latus (Acari: Tarsonemidae)

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Abstract

The broad mite, Polyphagotarsonemus latus (Banks) (Acari: Tarsonemidae), has been a devastating pest of several important agricultural and horticultural crops. Studies on the molecular mechanisms of adaptation to extrinsic conditions, e.g. acaricide exposure and temperature stress could aid in revealing the mite’s xenobiotic metabolism and quick adaptation to rapidly changing environments, respectively. This is best studied by the gene expression patterns, which could be accomplished through real-time quantitative reverse transcription PCR (qRT-PCR). Since real-time qRT-PCR studies require the selection of one or more reference genes whose expression patterns might vary across treatments, it is indispensable to validate their expression stability. In this study, the expression stability of six candidate reference genes viz., actin, elongation factor (EF-1α), glyceraldehyde-3-phosphate-dehydrogenase (GAPDH), ribosomal protein 49 (RP49), ribosomal protein S18 (RPS18) and β-tubulin (TUB) was investigated through real-time qRT-PCR experiments. By integrating the results of geNorm, NormFinder, BestKeeper, comparative ΔCt and RefFinder algorithms, RPS18/RP49 and EF-1α/RPS18 were identified as highly suitable reference genes for acaricide treatment and temperature stress treatments, respectively. RPS18 was recognized as the most suitable reference gene for both treatments which will ensure the accuracy of target gene expressions in studies related to xenobiotic metabolism and stress tolerance in P. latus.

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Abbreviations

Ct:

Cycle threshold

EF-1α :

Elongation factor

GAPDH :

Glyceraldehyde-3-phosphate-dehydrogenase

RP49 :

Ribosomal protein 49

RPS18 :

Ribosomal protein S18

TUB :

β-Tubulin

M value:

Expression stability value

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Acknowledgements

The authors extend gratitude to the Indian Council of Agricultural Research (ICAR) for funding under the Consortium Research Platform (CRP) on Genomics project. The first author profusely thanks the Department of Science & Technology, Government of India for the award of the DST- INSPIRE fellowship (2019/IF190096). The facilities provided by the Director, ICAR- National Bureau of Agricultural Insect Resources are thankfully acknowledged.

Funding

This study was supported by the Indian Council of Agricultural Research (ICAR)- Consortium Research Platform (CRP) on Genomics project and the Department of Science & Technology, Government of India through DST- INSPIRE fellowship (2019/IF190096).

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Contributions

All authors contributed to the study conception and design. NA conducted the experiment, performed data analysis and prepared the original draft. US analyzed the transcriptome data, selected the primer sequences and aided in primer designing. MM contributed to framing of the study, resources supply, data curation and draft corrections.

Corresponding author

Correspondence to Muthugounder Mohan.

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This article does not contain any studies with human participants or animals performed by any of the authors.

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Augustine, N., Selvapandian, U., Venkatesan, T. et al. Evaluation of reference genes for expression studies in the broad mite, Polyphagotarsonemus latus (Acari: Tarsonemidae). Appl Entomol Zool 59, 31–40 (2024). https://doi.org/10.1007/s13355-023-00848-3

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  • DOI: https://doi.org/10.1007/s13355-023-00848-3

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